Metal-shearing attachment



-Dd. 29, 1929. F. F. WRIGHT I METAL SHEARING ATTACHMENT Filed OCt. 7, 1927 INVENTOR flank F BY Patented Oct. 2 9, 1929 -'I rennin F. WBIGHT, or AURORA, ILLINOIS METAL-SHEABING ATTACHMENT Application fil ed October 7, 1927. Serial No. 224,723.

My invention relates to an improved shearing attachment particularly adapted for use with metal bending brakes and analogous machines. 1

It is an object of the invention to provide a shearing attachment which is readily and conveniently moved into and out of operative position and which will not interfere with the normal functioning of the machine to which it is attached. g

A further object of the invention is to provide a device of the above mentioned character which is simple and durable in construction, reliable and efficient in operation and inexpensive to manufacture.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawing forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

'F' g. 1, is a fragmentary front elevation of my improved shearing attachment,

Fig. 2, is a top plan view of the same, and,

Fig. 3, is a cross section taken on lines 3-3 of Fig. 2.

Referring to the drawing, wherein for the purpose of illustration I have shown a preferred embodiment of my invention, the numeral 5, denotes one of the track supporting arms pivoted at one end to the bracket 6, as at 7. The track 8 is connected at its end to the plate 9'cast integral with the free, end of arm 5, by bolts 10, it being understood that the opposite end of the track is supported by a like arm and bracket, not shown. The brackets 6 are adapted to be connected to the upper end of the standards of a conventional type of metal bending brake, or analogous machine, not shown, so when the track is in use it will be disposed on a horizontal plane above the working edge of the bending brake. To maintain the track firmly in an 5 operative position clamping lugs 11 are pivotally mounted-on the brackets 6, by wing screws 12, adapted to engage and hold down the arms 5. Thus, it is seen the track is so mounted, it may be readily and conveniently 0 swung upwardly out of the way when the machine to which it is attached is usedforbend- 7 ing metal.

The shearing mechanism is of'the traveling rotary cutter type such as disclosed in Patent Number 931,220, being mounted in-a carriage 13, slidably mounted on the track '8. The shear carriage is drawn longitudinally of the track by a flexible metal band 1 1, connected thereto at 15, and having its opposite end connected to a drum inclosed in the housing 16, attached to the outermost end of the frame 17 which extends beyond the end of the track. A crank 18 actuates the drum to wind the band thereon, drawing the shear carriage through the material to be cut. The inner end of the frame has. a pair of vertically.

spaced angular-1y projecting ears 19 and 20,

disposed in overlapping relationgwith respect to the ears 21 and 22, extending laterally from the depending post 23, cast integral with one of the arms 5, to which they are pivotally connected by pins 24. A platform 25 adapted'to receive the shear carriage ,upon'completion of the, cutting operation, extends laterally fromthe-frame beingdisposed on a horizontal plane with the underside of the carriage 13, anda side plate 26 is attached to its outer edge by screws 27.

, In orderto maintain the frame in proper alinement with the track a catch pin 28 has its ends respectively mounted in the lug 29 integral with the bottom of the drum housing 16, and the lug30disposed adjacent the ear 21, the latter being provided with spaced openings 31, adapted to receive the end of the catch pin locking the frame in position. A spring 32 is mounted on the catch pin between the lug 29 and cotter pin 33, extending through the catch pin, to normally hold the catch pin in engagement with the openings 7 31. The free end of the catch pin is bent to provide a hand grip 34;, for releasing the pin. WVhen the shear carriage is drawn onto the'platform and the catch pin released, the

frame can be swung around to assume a position parallel to the track, in which position it is held by the catch pin. V I

In operation, the shearing attachment assumes the position illustrated in Fig. 1 and the metal sheet to be cut is inserted in the til bending brake, so that its edge is in the path of the shear carriage. The operator then draws the shear carriage across the sheet by means of the crank which winds the flexible band on the drum. When the cutting operation is completed the shear carriage is pulled onto the plat-form of the frame, the catch pin released, and the frame swung around to a position parallel with the track, in which position it is locked by the catch pin. The shearing attachment can then be raised upwardly above the bending brake, so as to be out of the way until its use is desired'ag'ain.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same and that certain changes in the shape, size and arrangement of the parts may be made without departing from the spirit of the invention or the scope of the subjoined claims:

Having thus described my invention, I claim 1. In a shearing attachment of the character described, a pivotally mounted track, a shear carriage slidable on said track, means at one end of said track to receive said carriage and means for drawing said carriage along said track.

2. In a shearing attachment of the character described, a pivotally mounted track, a shear carriage slidable on said track, a pivotally mounted frame at one end of said track having a platform to receive said ourriage and means for drawing said carriage along said track. 7

3. In a shearing attachment of the character described, a pivotally mounted track, a shear carriage slidable on said track, a pivotally mounted frame at one end of said track having a platform to receive said carriage and means carried by said frame for drawing said carriage along said track.

4. In a shearing attachment of the character described, a pivotally mounted track, a shear carriage slidable on said track, a pivotally mounted frame at one end of said track having a platform to receive said carriage, means for holding said frame in alinement with said track and means for drawing said carriage along said track.

5. In a shearing attachment of the charac ter described, a pivotally mounted track, a shear carriage slidable on said track, a vertically pivoted frame at one end of said track having a platform adapted to receive said carriage and means carried by said frame for drawing said carriage along said track.

6. In a shearing attachment of the character described, a. pivotally mounted track, a shear carriage slidable on said track, a vertically pivoted frame at one end of said track, capable of swinging to a position parallel to said track, means carried by said frame for drawing said carriage along said track and means for locking said frame in position.

7 In a shearing attachment of the character described, a pivotally mounted track, clamps for holding said track in operative position, a shear carriage slidable on said track, a vertically pivoted frame at one end of said track, capable of swinging toa position parallel to said track, means carried by said framefor drawing said carriage along said track and means for locking said frame in position.

8. In a shearing attachment of the character described,brac.kets, a track, arms pivotally connecting said track with said brackets,

. a. shear carriage slidable on saidtrack, avertically pivoted frame'eonnected to,one of said arms having a platform, adapted toreceive said shear carriage, and means carriedby said frame for drawing said carriage along said track.v V I 9. In a shearing attachment of the charactre described, brackets, a track, arms pivotally connecting said track with said brackets,

clamps carried by said brackets for engage-f ment wlth said arms, a shear carria e slidable on said track, a. frame pivotallyconnected to one of said arms and extending in alinement with said track having a platform, adapted to receive said shear carriage, said f ame being capable of swinging to a position parallel with said track, means carried by said frame for drawingsaid shear carriage along said track, and releasable means for locking said frame in and out of operative position.

In testimony whereof Iafiix my signature.

FRANK F. WRIGHT. 

